doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

arch/microblaze/include/asm/microblaze_intc.h

@@ -30,7 +30,7 @@ struct irq_action {
  * @param irq	IRQ number
  * @param hdlr	Interrupt handler rutine
  * @param arg	Pointer to argument which is passed to int. handler rutine
- * @return	0 if registration pass, 1 if unregistration pass,
+ * Return:	0 if registration pass, 1 if unregistration pass,
  *		or an error code < 0 otherwise
  */
 int install_interrupt_handler(int irq, interrupt_handler_t *hdlr,